Rotary furnace



E. AMME ET AI.

RO'TARY FURNACE Filed Feb. 25, 1927 2 Sheets-Sheet 1 Inventars Ernst Amm&

772075 Die/2.5

E. AMME ET AL RO'IARY FURNACE Filed Feb. 25, 1927 Oct. 2, 1928.

2 Sheets-Sheet 2 cylinder c in a direction opposite to the movement of the burnfi material. Thus the length of travel is a multiple of the length 01 th e cooling chamber, so that the baked material is eifectively cooled, and the air is pieheated 130 a high temperature The air is admitted t the casing h through an i111et w in'the spout h, suitable means being provided f01 regulating the amount and the pressure of the air, und

after passing-through each of ehe annular chambers of the cooling drum in a direction contrary to the movement 0f the b1 1rnt material, it is delivered into the heating drum a, where it is used f01 burning the i'uel injected through the burner 0.

The casing k as we1l as the lid 70 are in airtight engagement with the cylinders b und d, suitable sliding joints being provided for this purpose. Thus there is no access of fresh ai1 from without 130 the inner part 015 'the cooling drum, and no escape of c0mpressed air fioiI1 the drum to the outer air.

While in describing the invention reference has been made 130 a particular example embodying the same we wish it t0 be understood that our ifivention is n0t limited to the comstruction shown in the drawing, und that various changes may be made in the gnefal arrangement of the apparatus und the construction of its parts without departing fr0m 'the invention. The cooling drum can for instance compr1se more than three. concentr1c cy11n ing drum and with each other at opposite ends, elevating ribs projecting ffrom said drums 1nto sa1d annular chambers, d1s1ntegrating means within said cooling drumflnd y means for rotating said drums.

2. A. rotary furnace compnsmg a rotary heating drum, heating means, a rotary C001- in'g drum in axial alignment with said heating drum and removable therefrom, said C001- ing drum comprising a plurality of concentric cylinders having ahnular chamber9provided between the same communicating respectively with the inner part 0f the cooling drum and with each other at opposite ends, elevating ribs projecting from said drums into said annular chambers, disintegrating means within said cooling drum ab the delivery end of i;he inner Passage thereof, and

means for rotating said drums.

3. A rotary furnace comprising 214 rotary heating drum, heatihg means, a r( tary cooling drum in axial alignment With said beating drum and removable therefrom, said cooling dr'um comprising a plurality of C011- centric cylindershaving annular chambers provided betWeen theS-ame Communicating fes]pectively with the inrie1 part of the 0001 ing drum and with euch other m; opposite ends, elevating ribs projedting from said drums into said annular chambers, the ribs projecting into one 0f said annular chambers being alternatingly carried by theouter and inner cylinders, and means for rotating said druins.

4, A rotary furnace cont1prising a rotary heat1ng drum, heat1ng meansa rotary cooling drum in axial alignment with said heating drum and removable therefrom, said cooling drum comprising a plurality 0f concentric oylinders having annular chambers pro- Vided between the ame Communieating respectivel'y with the inner part of the eooling dr1im and with each other at opposite ends, elevating ribs projecting from said drums into said annular chambers, a discharge chute provided at the delivery end of the outer cylinder and in air-tight engagemeht therewith und with the next cylinder of' the drum, means for rotating' said drums, and one 01 more pipes with means for irijecting reguiated amounts of water 111130 the cooling chamber between the intake' end and thedelivery end of the cooling drum.

In testimony whereof vve have hereunto Set our hands. v

ERNST AMME. KARL DIENST. -DAVID J. UHLE. 

